Audi RS6 Avant vs Mercedes-AMG G 63
Compare the Audi RS6 Avant vs Mercedes-AMG G 63. The Audi RS6 Avant is £37,000 cheaper. The Audi RS6 Avant is 1.0s quicker to 60mph. The Audi RS6 Avant is more fuel efficient. Full performance, cost & ownership breakdown.
The Audi RS6 Avant is priced from £108,000, powered by a 4.0L Twin-Turbo V8, producing 591 hp, with 800 Nm of torque, reaching 0-60 mph in 3.5s, a top speed of 190 mph, sent to the road via all-wheel drive. The Mercedes-AMG G 63 is priced from £145,000, powered by a 4.0L Twin-Turbo V8, producing 577 hp, with 850 Nm of torque, reaching 0-60 mph in 4.5s, a top speed of 149 mph, sent to the road via all-wheel drive.
The Audi RS6 Avant offers a 565-litre boot, folding rear seats, runs on petrol, returns around 24 mpg, is covered by a 3yr / unlimited mi warranty. The Mercedes-AMG G 63 offers a 688-litre boot, folding rear seats, runs on petrol, returns around 18 mpg, is covered by a 3yr / unlimited mi warranty.
On cost of ownership, the Audi RS6 Avant is £37,000 cheaper than its rival, the Audi RS6 Avant costs less in annual maintenance (£1,100 versus £1,500), the Audi RS6 Avant is the more fuel-efficient choice, a full tank costs around £90 for the Audi RS6 Avant and £120 for the Mercedes-AMG G 63.
Driving Character: Audi RS6 Avant vs Mercedes-AMG G 63
The RS6 Avant is the definitive super-estate, wielding a 4.0L twin-turbo V8 that delivers 591 hp with crushing authority. Its Quattro system and all-wheel steering work in tandem to shrink the car’s perceived size, allowing it to navigate complex B-roads with surprising ease. The power delivery is immediate, bolstered by mild-hybrid assistance that masks any hint of lag. It is a master of cross-country velocity, offering a level of grip and composure that remains unmatched in the sector. While the 4575 lbs mass is present, the chassis balance is so well-sorted that it never feels overwhelmed or ponderous.
The Mercedes-AMG G 63 remains an anomaly in the performance sector, coupling a body-on-frame architecture with a 577hp 4.0L twin-turbo V8. Its straight-line performance is ferocious, hitting 60mph in 4.5 seconds, yet its road manners are dictated by a high centre of gravity. The steering feel is inevitably disconnected compared to lower-slung rivals, requiring constant micro-adjustments on winding roads. Despite the heavy weight, the three locking differentials offer legitimate off-road capability that few other luxury SUVs can replicate. It is a characterful beast, preferring to dominate the road with sheer power rather than subtle handling finesse.
Head-to-head, the division is clear: the Audi RS6 Avant takes our 0-100 driving character grading, 75 against 68. Characteristic of the Audi RS6 Avant: Composed, quattro-assured pace rather than outright playfulness. For the Mercedes-AMG G 63: Characterful, brutish off-road-derived SUV with surprising on-road pace. In outright terms it is 591 hp against 577 — a 14 hp gap — and the Audi RS6 Avant reaches 60 mph 1.0s sooner.
Interior & Cabin: Audi RS6 Avant vs Mercedes-AMG G 63
The cabin is a sanctuary of technology and luxury, defined by the high-definition Virtual Cockpit Plus and exquisitely finished Valcona leather. Every surface speaks to Audi's commitment to quality, with supportive sports seats that hold the driver firmly during high-speed cornering. The interior design is sophisticated, blending sharp, angular lines with an understated elegance. Despite being a tech-forward environment, the ergonomics remain intuitive, ensuring that even complex adjustments are simple to perform. It is a space designed for long journeys, offering a sense of calm and control, even when the engine is under full load.
The cabin of the G 63 is a masterful blend of utilitarian heritage and modern luxury. The driving position is commanding, providing excellent visibility over the squared-off bonnet and robust architecture. Dual-screen MBUX integration updates the interior without eroding the rugged charm of the exposed grab handles and chunky switchgear. Build quality is exemplary, with premium leathers and metal finishes defining the space. While wind noise is an inherent trait of the boxy body shape, the cabin feels like a fortified vault of comfort, successfully merging the functional requirements of an off-roader with the opulence of an AMG model.
Head-to-head, the division is clear: the Audi RS6 Avant takes our 0-100 interior & cabin grading, 85 against 85. Characteristic of the Audi RS6 Avant: Spacious, airy, premium cabin with excellent tech. For the Mercedes-AMG G 63: Luxurious, distinctive cabin blending rugged heritage with modern tech.
Daily Usability: Audi RS6 Avant vs Mercedes-AMG G 63
Practically, the RS6 Avant is unrivalled as a high-performance family carrier. With 565 litres of boot space, which expands significantly when the seats are folded, it is ready for almost any task. The air suspension is a revelation, offering a plush, compliant ride for family trips while firming up instantly for spirited driving. Its wide body can be a liability in tight car parks, making the camera system a mandatory tool for urban navigation. However, the sheer ease with which it traverses miles in total comfort makes it an exceptional candidate for a single-car garage.
Practicality is defined by the G 63’s unique form factor. The 688-litre boot is expansive and easy to load, making it a highly effective family transport solution. Ingress is a climb, yet the upright seats provide long-distance comfort that belies the vehicle’s rigid chassis. Town use is the primary hurdle, as the immense width makes tight parking manoeuvres a tactical exercise. However, the high seating position grants the driver exceptional situational awareness in traffic. Fuel economy is predictably dire, averaging 18mpg, but for owners, the G 63’s sheer versatility and presence outweigh its logistical challenges.
Head-to-head, the division is clear: the Audi RS6 Avant takes our 0-100 daily usability grading, 92 against 78. Characteristic of the Audi RS6 Avant: Genuinely does everything — family transport, luggage and supercar-embarrassing pace. For the Mercedes-AMG G 63: Genuinely practical, go-anywhere family SUV with huge road presence. that means 565 litres of boot space against 688, and everyday running costs that favour the Audi RS6 Avant at the pumps.
Ownership: Audi RS6 Avant vs Mercedes-AMG G 63
Owning an RS6 Avant is an investment in unparalleled capability, though one must account for the significant running costs. With 24 mpg fuel economy and the wear associated with moving such high performance, it is not a cheap car to run. However, the Audi dealer network is top-tier, and the vehicle enjoys strong residual values, with enthusiasts constantly hunting for well-maintained examples. The annual maintenance costs are predictable for the segment, and the car's widespread support ensures longevity. For those who can stomach the fuel and service bills, it offers a level of excellence that is difficult to replicate.
The G 63 enjoys an almost cult-like following, reflected in its extraordinary residual values that often surpass the original list price. Ownership is supported by the extensive Mercedes dealer network, ensuring that maintenance is straightforward despite the niche status of the model. Annual servicing costs are substantial at £1,500, and the heavy weight ensures consistent wear on tyres and braking components. Insurance is typically high, yet the model remains a sound financial proposition for collectors. The combination of strong demand and limited production ensures that this SUV remains one of the most bankable vehicles in the AMG stable.
Head-to-head, the division is clear: the Audi RS6 Avant takes our 0-100 ownership grading, 72 against 70. Characteristic of the Audi RS6 Avant: Widely reported as a genuine daily joy to own. For the Mercedes-AMG G 63: Strong resale value and brand desirability keep it in high demand. On the wallet the two diverge at £108,000 versus £145,000 — a £37,000 difference, with annual maintenance of £1,100 against £1,500.